Avoid logging unnecessary trace in IPCLoggerChannel#close()

Details

Description

Avoid logging stack trace while close() in IPCLoggerChannel.

@Override
public void close() {
QuorumJournalManager.LOG.info("Closing", new Exception());
// No more tasks may be submitted after this point.
executor.shutdown();
if (proxy != null) {
// TODO: this can hang for quite some time if the client
// is currently in the middle of a call to a downed JN.
// We should instead dothis asynchronously, and just stop
// making any more calls after this point (eg clear the queue)
RPC.stopProxy(proxy);
}
}